Everything has probably been covered now but heres my version of events and how I did it all this year.
First of all try getting hold of the LGV application form from a post office, something which I found impossible at all the main post offices around me and had to phont the DSA up for one.
Once you got the application pack, which will inculde a medical form, find a doctor who will do it. You can shop around, no need to go to ‘your’ GP. Once you have passed this, send that, along with your filled in application off.
When your provisional licence has been returned to you with your Cat C (Class 2) you can book a theory, but only after you have the licence or they wont book it for you.
Once you have passed the theory you are then free to book a test, though all this will be taken care of by who ever you chose as your training provider.
On your test day you will need your theory cert with you before you can start your test. Don’t do what I did and lose the ■■■■ thing, it causes cronic worrying and although I could still do my test, though you have to tell the examiners in advance so they can do a computer check, its an un-needed worry.
Having passed Cat C, you can either send away for your entitlement yourself using the pass certificate you were given, or just leave your licence with the examiner and he’ll do it for you, the benefit of this is not only is it a bit quicker, but you get to keep your pass cert.
Once you have received your licence back with cat C on it, only then can you take your C+E (Class 1). Whilst in theory you may be able to book your test before hand (I don’t know for a fact that you can) it is not advisable because although your licence may only take a few days to come back, mine took two and a half weeks and thats with the examiner sending it away himself so don’t risk it. You don’t need your theory cert for your C+E and once you pass, its the same as with car C, either send off for it yourself or let the examiner do it.
Anyway, good luck!!!